2000-2003 Honda TRX350 Rancher factory service manual, Page 374Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEED
Possible cause 1Disconnect fuel tube at carburetor Fuel flow restricted Restricted fuel tube Restricted fuel tank breather tube Faulty fuel valve Clogged fuel strainer
Fuel flows freely
2Check carburetor for clogging
Clogged
Carburetor not serviced frequently enough
Not clogged
3Check valve timing
Incorrect
Camshaft not installed properly
Correct
4Check ignition timing
Incorrect